Original Paper

Gold Bulletin

, Volume 46, Issue 3, pp 165-173

Open Access This content is freely available online to anyone, anywhere at any time.

Green biosynthesis of gold nanometre scale plates using the leaf extracts from an indigenous Australian plant Eucalyptus macrocarpa

  • Gérrard Eddy Jai PoinernAffiliated withMurdoch Applied Nanotechnology Research Group, Department of Physics, Energy Studies, and Nanotechnology, School of Engineering and Energy, Murdoch University Email author 
  • , Peter ChapmanAffiliated withDepartment of Chemistry, Curtin University of Technology
  • , Xuan LeAffiliated withMurdoch Applied Nanotechnology Research Group, Department of Physics, Energy Studies, and Nanotechnology, School of Engineering and Energy, Murdoch University
  • , Derek FawcettAffiliated withMurdoch Applied Nanotechnology Research Group, Department of Physics, Energy Studies, and Nanotechnology, School of Engineering and Energy, Murdoch University

Abstract

In this preliminary study, we demonstrate an environmentally friendly process for the green synthesis of gold nanometre scale particles using the leaf extract from an indigenous Australian plant Eucalyptus macrocarpa as both the stabilising agent and the reducing agent. The synthesis process is straightforward, clean and non-toxic. It also has the advantages of being performed at room temperature and does not need complex processing equipment. Formation of the gold nanometre sized particles was confirmed and characterised by UV-visible spectroscopy, X-ray diffraction, transmission electron microscopy and field emission scanning electron microscopy. The antibacterial activity of the synthesised gold particles was also quantified using the sensitivity method of Kirby–Bauer.

Keywords

Gold Nano-particles Green synthesis Antibacterial Eucalyptus macrocarpa